Problems with FC4 kernels 1658 and 1831

Dave Jones davej at
Thu Feb 9 19:38:48 UTC 2006

On Thu, Feb 09, 2006 at 11:15:37AM -0800, Peter J. Stieber wrote:
 > I have three different machines that have been having problems with the 
 > last two FC4 kernels. The first is a 733 MHz Pentium III with 256 MB RAM 
 > and a 230 GB IDE disk. It acts an Apache web server and a subversion 
 > server. The machine gets into a mode where it prints the following on 
 > the console (the numbers may be a little different):
 > Normal per-cpu:
 > cpu 0 hot: low 62, high 186, batch 31, used 99
 > cpu 0 cold: low 0, high 62, batch 31, used 57
 > HighMem per-cpu: empty
 > Free pages:           2972kB (0kB HighMem)
 > Active:0 inactive:0 dirty:0 writeback:0 stable:0 free:743 slab:16038 
 > mapped:22857 pagetables:22109
 > DMA: free:1080kB  min:124kB low:152kB high:184kB active:120kB 
 > inactive:264kB present:16384kB pages_scanned:1840433 all_unreclaimable? 
 > yes
 > lowmem_reserve[]: 0 239 239
 > Normal free:1892kB  min:1916kB low:2392kB high:2872kB active:13492kB 
 > inactive:13320kB present:245680kB pages_scanned:787375 
 > all_unreclaimable? yes
 > lowmem_reserve[]: 0 0 0
 > HighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB 
 > present:0kB pages_scanned:0 all_unreclaimable? no
 > lowmem_reserve[]: 0 0 0
 > DMA: 0*4kB 1*8kB 1*16kB 1*32kB 0*64kB 0*128kB 0*256kB 0*512kB 1*1024KB 
 > 0*2048kB 0*4096kB = 1080kB
 > Normal: 1*4kB 0*8kB 2*16kB 2*32kB 0*64kB 4*128kB 1*256kB 0*512kB 
 > 1*1024KB 0*2048kB 0*4096kB = 1892kB
 > HighMem: empty
 > Swap cache: add 222217, delete 221977, find 1020061/1033074, race 0+2
 > Free swap = 0kB
 > Total swap = 524280kB
 > Notice the machine is out of swap space so there seems to be a process 
 > that is running amuck, but I can't tell what it is. I have to shut the 
 > machine off to make progress. This also occurred with 1831.

When this gets printed, there should also be something in the logs like
"kernel: killed process foo", which should be the app that was consuming
your memory.

 > The third machine is a dual Tyan Dual Opteron machine. It experienced 
 > the problem with a 1831 when trying to compile a large code.
 > Has anyone experienced similar problems?

There were some leaks in the older kernels that could explain it,
but they usually manifested themselves slightly differently.
1831 has them fixed though (though there may still be some undiscovered,
and there's one known problem that I was made aware a day or so ago
where SELinux leaks memory. I'll get a test kernel with that fix
built after is released).


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